It should be noted that if the initial conditions are imposed at the bounce, from Fig. REF  we can see clearly that some modes are inside the comoving Hubble radius, and some are not.
In addition, in the neighborhood of the bounce, the background is far from de Sitter. So, it is impossible to impose either the BD vacuum or the de Sitter state at the bounce. In this case, one of the choices of the initial conditions is the fourth-order adiabatic vacuum, similar to that in LQC [1]}, [2]}, [3]}, [4]}, [5]}.
